大学英语四级语法复习精品PPT课件

A She has been few here only two
weeks, but she has already made a few friends.
A I’m very little pleased. I’ve
been able to save a little money this
时间状语从句
时间状语从句的形式
When the phone rang, the baby woke up.
The baby woke up when the phone rang.
When the phone rang 是 一个时间状语从句。状语 从句是从句的一种，它必 须依附于一个独立分句 （或主句）。
a) By the time he arrived, we had already left.
b) By the time he
By the time= one event is completed before
comes, we will have already left.
another event
用时间状语从句表示时间关系
Whenever Every time
a) Whenever I see her, I say hello.
b) Every time I see her, I say hello.
Whenever =Every time
用时间状语从句表示时间关系
The first time
用时间状语从句表示时间关系
As long as So long as
=during all that time, from beginning to the end
I will never speak to him again as long as I live.
I will never speak to him again so long as I live.
While as
While, as = during that time
a) While I was walking home, it began to rain.
b) As I was walking home, it began to rain.
用时间状语从句表示时间关系
By the time
a) The first time that I
The last time
went to New York, I
The next time
went to an opera.
first The last
b) I saw two plays the
time (that)
last time (that) I went to New York.
用时间状语从句表示时间关系
Until Till
= to that time and then no longer
a) We stayed there until we finished our work,
b) We stayed there till we finished our work.
c) He didn’t come home until 12 句中的用法
用时间状语从句表示时间关系
Since
Since = from that time to the present 注意：主句中使用现 在完成时
a) I haven’t seen him since he left this morning.
b) I’ve known her ever since I was a child.
冠词用法的基本原则
练习：判断正误 A sun is bright today. Please open a door. The apples are my favorite fruit. The gold is a metal I drove a car.
A few 和fewer, A little 和 Little的用法
when= at that time
stood under a tree.
注意：不同的时态表 d) When I was in Chicago, I
示不同的时间关系。
visited my uncle.
e) When I see him tomorrow,
I will ask him.
用时间状语从句表示时间关系
next
c) The next time (that)
I go to New York,
I’m going to see a
ballet.
冠词用法的基本原则
原则一：当你知道或认为听者熟悉你说谈 论的事物和人时，用 the
原则二：用于表示概括时,复数可数名词或 不可数名词前不能加the.
原则三：使用单数可数名词时，一定要加 ⑴a或an (one, each, every); ⑵the；this或 that; ⑶ 物主代词或所有格（my, Jim’s）。
如果状语从句在主句前， 两个分句间要用逗号隔开。
用时间状语从句表示时间关系
After Before
a) After she graduates, she will get a job.
b) After she graduated, she got a job.
a) I will leave before he comes.
用时间状语从句表示时间关系
As soon as once
= when one event happens, another event happens afterwards.
a) As soon as it stops raining, we will leave.
b) Once it stops raining, we will leave.
b) I left before he came.
用时间状语从句表示时间关系
When
a) When I arrived, he was talking on the phone.
b) When I got there， he had already left.
c) When it began to rain, I